Ultrasonic cleaner



FIG. 1 is a front top perspective view of an ultrasonic cleaner;

FIG. 2 is a top plan view of the ultrasonic cleaner as shown in FIG. 1;

FIG. 3 is a bottom plan view of the ultrasonic cleaner as shown in FIG. 1;

FIG. 4 is a front elevation view of the ultrasonic cleaner as shown in FIG. 1;

FIG. 5 is a left side elevation view of the ultrasonic cleaner as shown in FIG. 1, which includes left-right symmetry; and,

FIG. 6 is a rear elevation view of the ultrasonic cleaner as shown in FIG. 1.

The dashed lines in the drawings depict portions of the ultrasonic cleaner that form no part of the claimed design. 

CLAIM The ornamental design for an ultrasonic cleaner, as shown and described. 